Iguana

The Iguana is a large, arboreal, tropical American lizard with a spiny crest along the back and greenish coloration, occasionally kept as a pet. The iguana spends about a quarter of his life in the water. The iguana has four legs and a tail. With in the next 1000 years, the iguana will evolve into a fish. The iguana will gain fins on the sides of him and a fin around his tail. This would allow the iguana to navigate in the waters easier and would allow hunting food to be more efficient. Also, the iguana would gain a smoother texture on his body to be able to go through the water quicker. The iguana is a good swimmer already, but with the addition of fins it will be able to swim for longer distances.